Akrapovic releases catless downpipes for the S63 V8 in the X5M and X6M

S63 twin turbo V8 owners now have another downpipe options courtesy of Akrapovic. The piece itself is made out of stainless steel and is catless. No additional details were supplied. We would like to at the very least know the cost and claimed power gains. A dyno would definitely be warranted as well. Akrapovic makes quality exhaust pieces but without further details it makes for a very weak product unveiling. Akrapovic pieces tend to be expensive so do not expect this to be a value in S63 tuning.

Has anyone installed these- is there any drone? How's the sound? I have Akrapovic cat back now on 2012 x6m and am considering getting the Downpipes but am worried about drone from the cat delete. Any input would be appreciated.

Has anyone installed these- is there any drone? How's the sound? I have Akrapovic cat back now on 2012 x6m and am considering getting the Downpipes but am worried about drone from the cat delete. Any input would be appreciated.

Don't know anyone here running these but you can be confident with Akrapovoic quality.

I'm looking at running the akrapovic DP but my dinan tune isnt comparable. The shop recommended renntech tune as they will add the cat delete to their tune. Claiming 650 Hp with renntech and exhaust. Anyone have experience with renntech? Im not crazy about having to ship ecu for flash.

I'm looking at running the akrapovic DP but my dinan tune isnt comparable. The shop recommended renntech tune as they will add the cat delete to their tune. Claiming 650 Hp with renntech and exhaust. Anyone have experience with renntech? Im not crazy about having to ship ecu for flash.

Nothing wrong with having to ship the ECU.

Yes, Renntech will do a custom tune for you and for your DP's. You can be very confident with their work, stellar reputation.